Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ba47ed62a02c903…

MALICIOUS

PDF

73.1 KB Created: 2021-03-15 03:04:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6efa086579c03b091406c814cf9b0e39 SHA-1: 204ef23814de8fc61c249da069ee61bd39056fa6 SHA-256: 3ba47ed62a02c9031cf0514daf8960fca0105b0be33f0dddf93f8bfbbee69e09
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file exhibits characteristics of a link farm, containing numerous external URLs designed to direct users to potentially malicious websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or SEO poisoning. The presence of external URIs and the PDF_SEO_LINK_FARM heuristic confirm the document's purpose is to distribute links, potentially leading to further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://fokemale.ru/wix?keyword=boxhead+3+multiplayer PDF link annotation
    • http://walkover.me/vujoxavoxiluzevekiehjgs.pdfIn PDF document text
    • http://gagivukamuw.getenjoyment.net/los_temperamentos_del_ser_humano.pdfIn PDF document text
    • http://igme.site/gajanusunu3ri6y.pdfIn PDF document text
    • https://cdn.sqhk.co/rovukupovumo/hcCydm7/evacuation_map_santa_cruz_cal_fire.pdfIn PDF document text
    • http://zvezdasevera.online/free_reading_comprehension_worksheets_for_fourth_gradersqh6ul.pdfIn PDF document text
    • http://vipmanmarket.space/54717629507jc6hp.pdfIn PDF document text
    • https://cdn.sqhk.co/dogilijesiwu/fShghja/varufafiwerafo.pdfIn PDF document text
    • http://idealica-columbia.site/apc_back-ups_be750g_manualipwnv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fojosotum.myartsonline.com/13666889630.pdfIn PDF document text
    • https://a86a6b26-b473-4b55-b9aa-7628a2bff077.filesusr.com/ugd/4f270c_2d6d8150ef054ef19406762f03f28a35.pdf?index=trueIn PDF document text
    • https://14319df0-7947-4f0d-bbb3-eaa17d5eb23e.filesusr.com/ugd/c45f38_0e13b66ceacf434491b4b980e2ad9411.pdf?index=trueIn PDF document text
    • https://fea50346-ab34-4b67-843e-90a6383c4983.filesusr.com/ugd/bf678e_dd5a7b7d799f4a7090458604da34872a.pdf?index=trueIn PDF document text
    • https://f64a1a0a-debf-4843-a838-a34c0cae0f4a.filesusr.com/ugd/89602e_d8cd5043be0942f7a527a6d1d2a6fc4e.pdf?index=trueIn PDF document text
    • https://923a8ca3-316b-4844-b38f-9bc955ad4852.filesusr.com/ugd/312e0e_a7e05c766d10483297d732328e544d2f.pdf?index=trueIn PDF document text
    • https://ddb0fe67-a09a-413d-b59a-c21b1dde3186.filesusr.com/ugd/3f0e57_d8d9a98776764ed19a496c90f8090651.pdf?index=trueIn PDF document text
    • http://manosotidokef.myartsonline.com/12651167124.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e14d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14D 5404 bytes
SHA-256: 02b1c1748a2f6df8e4786bfa2eab75d4ae318ef49ca468cf931d9687969a2698
font_01_sfnt_off0000f395.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF395 10540 bytes
SHA-256: 88f3b397c8f7491f65dc2462f6cf889f2249d93570e5037a8557cb4474305d9c

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